Metal-Insulator Transition in Zinc-Doped LaSrCuO

• Authors: A Malinowski , M Cieplak , M Berkowski , W Plesiewicz , T Skośkiewicz
• Languages of publication: EN

Abstracts

EN

The magnetotransport in the vicinity of the metal-insulator transition in La_{1.85}Sr_{0.15}Cu_xZn_{1-x}O_4 is studied in the mK temperature range. Both longitudinal and transverse magnetoresistance are negative indicating the importance of spin effects. The magnitude of transverse magnetoresistance is larger than the magnitude of longitudinal magnetoresistance, indicating the absence of positive orbital magnetoresistance, in sharp contrast to strongly underdoped La_{2-x}Sr_xCuO_4. Both transverse and longitudinal magnetoresistance are proportional to the relative change of zero-field conductivity. This suggests that low-temperature localization of carriers may originate in the spin-disorder scattering on the spin droplets around Zn-impurities.

Keywords

EN

74.72.-h; 71.30.+h; 74.25.Fy

Discipline

• 74.72.-h: Cuprate superconductors
• 71.30.+h: Metal-insulator transitions and other electronic transitions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 617-621

Dates

published

2006-04

received

2005-09-25

Contributors

author

A Malinowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M Cieplak

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M Berkowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

W Plesiewicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T Skośkiewicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

References

• 1. Y. Dagan, M.C. Barr, W.M. Fisher, R. Beck, T. Dhakal, A. Biswas, R.L. Greene, Phys. Rev. Lett., 94, 057005, 2005
• 2. Marta Z. Cieplak, A. Malinowski, S. Guha, M. Berkowski, Phys. Rev. Lett., 92, 187003, 2004
• 3. K. Karpińska, Marta Z. Cieplak, S. Guha, A. Malinowski, T. Skośkiewicz, W. Plesiewicz, M. Berkowski, B. Boyce, T.R. Lemberger, P. Lindenfeld, Phys. Rev. Lett., 84, 155, 2000
• 4. M.-H. Julien, T. Fehér, M. Horvatić, C. Berthier, O.N. Bakharev, P. Ségransan, G. Collin, J.-F. Marucco, Phys. Rev. Lett., 84, 3422, 2000

Identifiers

DOI

10.12693/APhysPolA.109.617